Electrosynthesis of vinyl sulfones from alkenes and sulfonyl hydrazides mediated by KI: Аn electrochemical mechanistic study
作者:Alexander O. Terent'ev、Olga M. Mulina、Dmitry A. Pirgach、Alexey I. Ilovaisky、Mikhail A. Syroeshkin、Nadezhda I. Kapustina、Gennady I. Nikishin
DOI:10.1016/j.tet.2017.10.047
日期:2017.12
sulfones were prepared from alkenes and sulfonyl hydrazides via electrochemical oxidative sulfonylation. The reaction proceeds in an experimentally convenient undivided electrochemical cell equipped with graphite and iron electrodes employing KI as a redox catalyst and a supporting electrolyte. Applying extremely high current density up to 270 mA/cm2 permits rapid synthesis in a compact reactor and
由烯烃和磺酰肼通过电化学氧化磺酰化反应制备了各种乙烯基砜。该反应在配备了石墨和铁电极且使用KI作为氧化还原催化剂和支持电解质的实验方便的未分隔电化学电池中进行。施加高达270 mA / cm 2的极高电流密度,可以在紧凑的反应器中以小表面积电极快速合成。利用循环伏安法提出了一种可能的反应机理。在该反应中阳极和阴极过程的结合使得可以在温和的条件下以中等至高的产率获得产物。
One-Pot Synthesis of β-Hydroxysulfones and Its Application in the Preparation of Anticancer Drug Bicalutamide
作者:Yajun Wang、Wei Jiang、Congde Huo
DOI:10.1021/acs.joc.7b01371
日期:2017.10.6
reduction of peroxides for the synthesis of complex β-hydroxysulfone derivatives from phenthiols and alkenes. This method has several advantageous characteristics, including readily available substrates, low-cost and environmental benign reagents, nontoxic and renewable solvents, and mild reaction conditions. The application of this transformation to the multigram-scale preparation of the anticancer drug bicalutamide
Visible-light initiated direct oxysulfonylation of alkenes with sulfinic acids leading to β-ketosulfones
作者:Daoshan Yang、Ben Huang、Wei Wei、Jin Li、Gu Lin、Yaru Liu、Jiehua Ding、Pengfei Sun、Hua Wang
DOI:10.1039/c6gc01403h
日期:——
Highly efficient visible-light initiated direct oxysulfonylation of alkenes with sulfinic acids leading to β-ketosulfones has been realized under metal-free conditions.
利用高效的可见光引发的直接烯烃与亚砜酸发生氧磺化反应,从而在无金属条件下合成β-酮磺酮。
Copper(<scp>i</scp>)-mediated synthesis of β-hydroxysulfones from styrenes and sulfonylhydrazides: an electrochemical mechanistic study
作者:Alexander O. Terent'ev、Olga M. Mulina、Dmitry A. Pirgach、Dmitry V. Demchuk、Mikhail A. Syroeshkin、Gennady I. Nikishin
DOI:10.1039/c6ra19190h
日期:——
Copper(I) halides were used as mediators in the synthesis of β-hydroxysulfones via the oxysulfonylation of styrenes using sulfonylhydrazides. The feature of the developed process lies in the combination of a copper(I) salt with oxygen—the stoichiometric oxidant. Copper(II) species are responsible for the oxidation of sulfonylhydrazides, they are generated in small amounts in the O2/Cu(I)/Cu(II) redox
Generation of sulfonyl radicals from sulfonylhydrazides has been achieved in the presence of a non-toxic iron catalyst and oxygen. The intermolecular addition of resultant sulfonyl radicals to alkenes affords β-hydroxysulfone compounds.